Re: BUG from text_poke() during CPU offlining

Gary Hade
2009-04-20T19:47:39Z

On Wed, Apr 08, 2009 at 01:21:18PM -0700, Masami Hiramatsu wrote:
> Hi Gary,
>
> Gary Hade wrote:
> > I ran into the below BUG with 32-bit 2.6.30-rc1 while offlining
> > all of the offlineable CPUs. It happened when the last offlineable
> > CPUs was being offlined. The problem disappeared after I reverted
> > the following two patches.
> > - x86: implement atomic text_poke() via fixmap
> > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=78ff7fae04554b49d29226ed12536268c2500d1f
> > - x86: expand irq-off region in text_poke()
> > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7cf49427042400d40bdc80b5c3399b6b5945afa8
>
> Hmm, this bug seems that the same bug I reported recently.
>
> http://lkml.org/lkml/2009/4/4/71
>
> I'm working on that.

Masami,
Just confirming that I can no longer reproduce the problem with
2.6.30-rc2 which includes your fix (http://lkml.org/lkml/2009/4/10/346).

>
> Thank you for reporting!

Thank you for fixing!

Gary

--
Gary Hade
System x Enablement
IBM Linux Technology Center
503-578-4503 IBM T/L: 775-4503
garyhade@us.ibm.com